Hair fibers do not cause hair loss, as they are cosmetic products that simply sit on top of existing hair. Made from keratin or cotton, they attach electrostatically to strands, giving the illusion of density. Since fibers don’t penetrate the scalp or affect follicles, they have no role in triggering shedding. However, using low-quality products or failing to wash them properly could irritate sensitive scalps. Overall, high-quality hair fibers are safe and effective for concealing thinning areas without causing damage.
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